Yuko, born into a wealthy family, married Toshihiko, who worked at her father's company, and lived a happy life. However, everything changed after her father's sudden death. Her stepmother, Michiyo, and her lover conspired to seize the inheritance, threatening Yuko into submission. Ultimately, she was cruelly forced into a life of slavery and trained to become a soapland prostitute. This story depicts her suffering and struggle.